Steve Richardson and Andy Powell on Harvesting and searching IMS metadata using both the OAI Protocol for Metadata Harvesting, and the Z39.50 Protocol. <a href="/issue34">issue34</a> January 2003 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/354/author-info">andy powell</a>, <a href="/taxonomy/term/701/author-info">steve richardson</a> Andy Powell describes UKOLN's OpenResolver, a freely available demonstration OpenURL resolver. <a href="/issue28">issue28</a> June 2001 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/354/author-info">andy powell</a> Ian Peacock and Andy Powell describe a proposed algorithm for calculating a checksum for Web pages. <a href="/issue17">issue17</a> September 1998 <a href="/category/article-type/regular-column">regular column</a> <a href="/taxonomy/term/354/author-info">andy powell</a>, <a href="/taxonomy/term/490/author-info">ian peacock</a> Andy Powell presents three models for the way in which metadata can be managed across a Web site and describes some of the tools that are beginning to be used at UKOLN to embed Dublin Core metadata into Web pages. <a href="/issue10">issue10</a> July 1997 <a href="/category/article-type/feature-article">feature article</a> <a href="/taxonomy/term/354/author-info">andy powell</a> Performance and Security - Notes for System Administrators: Andy Powell offers some hints and tips on the performance and security aspects of running electronic library services on UNIX based machines. <a href="/issue8">issue8</a> March 1997 <a href="/category/article-type/tooled">tooled up</a> <a href="/taxonomy/term/354/author-info">andy powell</a>